From Ying Huang's memory, Gao Yun knew that his current self wanted to make a comeback, and there was still a big lack of strength, and he also knew that if he wanted to greatly improve his strength in a short period of time, he would have to return to this treasure hall.

This treasure hall needs the Netherworld Dragon Pendant to open, so it was only preserved in the catastrophe of the year, and only the city lord of the Netherworld Imperial City can enter, and a person can only enter once in his life, the last time Shadow Huang entered, got the fourth layer of the Netherworld Demon Dragon Recipe's scorching artistic conception of the magic technique, and this time, Shadow Huang's goal is very clear, that is-the remaining fifth layer of the Netherworld Demon Dragon Recipe's destruction artistic conception and the sixth layer of devouring artistic conception!

In the courtyard, the original two huge stone doors have long disappeared into the dust of the past, but that was originally just a trick, and the one who can really open the treasure hall is actually the dragon pendant owned by the city lord of the Imperial City.

As Gao Yun took out the Netherworld Dragon Pendant, in the space in front of him, there was a sudden surge of energy, and then there was a little fluorescent flash, accompanied by the faint sound of wind and thunder, the surrounding heaven and earth aura, frantically converged, a black vortex appeared out of thin air, the vortex continued to rotate, and finally turned into a dark and colorless hole.

Skillfully opening the Treasure Hall with the Nether Dragon, Shadow Huang walked into the mysterious huge cave again......

The vision changed, and Ying Huang came to the treasure hall, in front of Ying Huang, it was still the huge cave full of depressions and holes all around, but Gao Yun found that compared with the scene in Ying Huang's memory, the various treasure scrolls on the stone wall of this cave seemed to be a lot less, and there were a lot more empty holes, which made him a little surprised.

Just as he was thinking about it, two clusters of light, one gray and one black, flashed, and the gray-clothed old man and the black demon dragon that Ying Huang had seen before appeared in front of him.

The old man twisted his beard, looked Gao Yun up and down, a hint of strange color suddenly flashed in his eyes, and then he said: "Ahem, I am the guardian of this Netherworld Secret Realm, I seem to have seen you somewhere, I look a little familiar......"

The black demon dragon stared at Gao Yun with huge lantern-like eyes, and then said strangely: "This aura is very familiar, it seems that I have been here before, but strange, a person can only come once!"

When Gao Yun heard this, he couldn't help but scratch his head, and he didn't hide it, and then briefly explained his relationship with Ying Huang to the two of them.

The old man and the demon dragon glanced at each other, their eyes showing doubt, they had never encountered Gao Yun's situation before.

The old man pondered for a while, then waved his sleeves and said, "Well, since you can come here, it means that you have the qualifications to participate in the trial, but I don't know, what do you fancy this time?"

Gao Yun had already calculated in his heart, and immediately clenched his fists and replied, "Two adults, this time I want to challenge the fifth and sixth layers of the Nether Demon Dragon Technique. ”

The old man was slightly stunned when he heard this, and at this time, the demon dragon's eyes suddenly flashed, and the high clouds in front of him, and the person they thought of at the same time, instantly overlapped.

"You—you're the one who came to the Imperial City a long time ago!"

"Shadow Glory...... Ying Huang, that's right, the family of the Imperial City is surnamed Ying, it turns out that you are actually the reincarnation of that kid!"

Gao Yun was also stunned.

I had obviously said about Yinghuang just now, but I didn't expect them to react until now.

Looking at the slightly excited eyes of the two, Gao Yun asked cautiously, "So, can I start the fifth-layer trial now?"

The gray-clothed old man groaned slightly, and then Gao Yun shook his head in surprise.

"Although you are indeed talented, but the rules set by the Demon Dragon Clan are unbreakable, you didn't complete the third layer last time, and you didn't participate in the fourth layer trial, but this guy just lost to you in a bet, so this time, you have to come step by step, and first clear the third layer of the Demon Dragon Jue. ”

"Okay," Gao Yun frowned slightly, and said helplessly, "Please start quickly, my lord, I have limited time." ”

"Time is limited?" the old man replied when he heard this, "I'm afraid this won't work, the third layer is just a continuous battle, but starting from the fourth layer of trials, it is not here, but in the upper plane where the Demon Dragon clan has settled, although the time between here and the upper plane for your world is ten to one, but if you want to pass the fourth to sixth layer trials, I'm afraid the time will not be short." ”

Gao Yun secretly "chuckled" in his heart and asked, "May I ask my lord, how many days was the fastest record to pass the fourth to sixth layer trials before?"

The old man smiled and said, "The fastest, at least half a year, and at least more than twenty days if you compare ten to one." ”

After secretly calculating, Gao Yun felt that he should be able to pass the fourth layer quickly, so the fifth and sixth layers were estimated to be completed in half a year, that is, eighteen days, which was still within the range he could bear. If it was too long, he was a little worried about the safety of Zhu Ling and them outside.

"How's that? are you going to continue?"

Taking a light breath, Gao Yun resolutely said, "Okay, let's continue!"

The old man glanced at Gao Yun and said, "Although you have obtained a drop of Demon Dragon blood, the bloodline concentration is still quite different from the real Demon Dragon Clan, the last twenty games of this third layer, you will encounter the inner clan disciples of the Demon Dragon Clan, and the difficulty of the trial will be very high, are you sure to continue?"

"I'm sure!" Gao Yun clenched his fists, the purpose of his coming here was to learn the complete Nether Demon Dragon Technique, and in the face of such a choice, he would naturally choose to be sure.

"Okay, then it's as you wish!" After the old man finished speaking, his figure gradually rose up, flying dozens of feet into the air, looking down at the high clouds. "Finally, I would like to remind you, the opponents of the third layer were all excellent disciples with names and surnames in the clan, and now, the Netherworld Secret Realm will restore them according to their memories and defeat them all, and you can be qualified to participate in the next trial!"

As soon as the old man's words fell, Gao Yun's eyes flickered, and he instantly found himself teleported to a desolate flat land.

Ten zhang in front of Gao Yun, a hazy dark red phantom appeared.

Gao Yun's heart froze, is it a disciple of the inner clan of the Demon Dragon Clan? I don't know if it is stronger than the Rahu Dark Night that Ying Huang faced before.

Slowly pulling out the black heavy sword in the bracelet, Gao Yun's eyes looked ahead, and his heart was burning with battle intent.

The dark red phantom slowly solidified, and finally turned into a majestic man holding a red spear, his eyebrows were thick and straight, his face was white and delicate, and his chin was as thin as a slash.

"The eighty-third trial of the third layer, the general of the Demon Dragon Clan's fierce battle camp, Rahu Chixin!" In mid-air, a voice without the slightest emotion sounded, reminding Gao Yun of the identity of the enemy in front of him.

General of the Fierce Battle Battalion, Rahu Chixin?

Listening to the meaning of this voice, the Demon Dragon Clan seems to have an army-like organization, and the Fierce War Camp is one of them.

I don't know what level of combat power the fierce war camp is, and what kind of cultivation the soldiers in it have reached?

Gao Yun laid out the black heavy sword, and his heart was inexplicably full of yearning for the Demon Dragon Clan more than 100,000 years ago, the army of that era didn't know what it should look like, I am afraid that it was far more powerful than these existing sects in the Six Realms!

After Luo Hu Chixin's figure was completely condensed, he held the red spear obliquely, and the tip of the spear pointed directly at Gao Yun.

"Early Heavenly Netherworld Cultivation?" Gao Yun noticed that Rahu Chixin's cultivation was only the early stage of the Heavenly Netherworld, but it was difficult to say which one was in the early stage of the Heavenly Netherworld, which was probably because the other party's physique and cultivation system were different from the current cultivators of the Six Realms.

"The early stage of cultivation in the Heavenly Netherworld Realm can give people such pressure, and now there is no one in the Six Realms who can match it, I don't know how old Luo Hu Chixin is to leave a record of this phantom in front of him, if it is in his twenties, it will be even more terrifying!" Gao Yun's face was solemn, but his eyes were burning with battle intent, this was the first time he faced a young handsome man who could really compare with him.

"Boom!"

Luo Hu Chixin didn't say a word, he stabbed straight at Gao Yun with a shot!

The flame aura between heaven and earth was completely stirred up by this shot, forming a flaming phoenix phantom, roaring straight towards Gao Yun!

The phantom has not arrived, and the heat wave has already fallen!

"Good marksmanship!"

The battle intent in Gao Yun's eyes exploded, in the face of such a fierce enemy, he didn't dare to be careless at all, and he used the power of the demon dragon at the beginning!